Couch roll



N. E. BOOTH July 2, 1929.

COUCH ROLL Filed May 19, 1927 INVE/VTUI? NELSON E. BOOT/l Arm Patented July 2, 1929.

NELSON E. BOOTH, or BROOKLYN, NEW YORK.

COUCH ROLL.

Application filed May 19,

.This invention relates to couch rolls for paper machines and has for its principal object' to provide a new and improved construction of a couch roll having very superior advantages over the constructions heretofore employed, 7

Considered more specifically, the present invention relates to a new and improved construction for covering the active working surface of the couch roll. These rolls as is well known in the art are covered with anysuitable resilient porousmaterial, capable of taking up the paper pulp from the endless conveying belts of the cylinder type paper making machines. It has been a common practice in the art to employ woven felt strips secured from disused conveyorbelts as a covering for the couch rolls. While this practice enables material which otherwise would be wasted, to be employed, the attaching of the old woven belt felt to the couch roll is a very difficult and time consuming operation and consequently involves relatively high labor costs. Furthermore, as the woven felt usually employed for this purpose is felt which has been used for a considerable period of time as a conveyor blanket, it has already been subjected to considerable wear, consequently the length of service in such felt when used as a covering for the couch roll is comparatively short.

The present invention has for a further object to provide a new and improved construction for a covering for a couch roll which can not only be attached to the roll foundation in a comparatively short time, and which, in addition, will have a much longer period of service than those formerly used.

The above and other objects will appear more fully from the following more detailed description and by reference to the accompanying drawings forming a part hereof, wherein Fig. 1 is an end elevation partly in section of a couch roll embodying the principles of my invention; Fig. 2 is a front elevation, and Fig. 3 is a view similar to Fig. 2 showing a slightly modified form of aroll covering.

As shown in Fig. 1 of the drawings, the roll consists of a cylindrical block or core 10, preferably constructed of wood, through the center of which extends a roll shaft 11, suitable bearings 12 being interposed between the block 10 and said shaft, in accordance with the usual construction of devices of this charact-er. The shaft 11 is non-rotatably secured 1927. Serial No. 192,526.

. to the block by any suitable'means, such as the '15 of unwoven pressed felt, which strips are suitably secured at their inner ends to the block as by means of the nails 16 which are driven at an angle through the corners of the strips and into the block.

The strips 15 are preferably rectangular in cross section and in the operation of securing them to the block, the inner edges of said strips, adjacent to the block, are compressed sufliciently when'thestrips .are nailed in place by the nails 16, so that in the final completed form of the roll, the strips are substantially wedge-shaped incross section, and the outter cylindrical surface formed by thestrips is a substantially continuous surface. I

In order to prevent separation of the stripe at their outer edges, the radially extending faces of the strips may be coated with cement or other suitable adhesive to cause each strip to adhere to its adjacent strip. As a further precaution toprevent spreading of the strips at their upper edges, I may provide some form of binding or tyingvmeans, such as the wire 17, which extends through the strips and circumferentially of the roll at a point substantially midway between the periphery of the block 10 and the outer cylindrical surface formed by the outer faces of the strip. Although only one of such wires has been shown in Fig. 1 of the drawing, it will be understood that a plurality of such wires are used and that they are located at spaced intervals longitudinally of the roll.

The strips may be of any suitable cross sectional dimension. In practice, it has been found that a strip of about a one inch by two inch of rectangular cross section gives very satisfactory results. e

The operation of attaching the strips to the roll is comparatively simple and requires but a relatively short amount oftime. In order to secure the best results, the felt strips should be made of new wool, having comparatively long fibers, so as to secure a product having markedly resilient properties, great resistance to wear and excellent waterproof qualities. It has been found that the use of such strips give remarkably exceptional resuits; the life of the covering made with such strips being many times longer than that of coverings made from Woven felt. In addition, the pressed felt, such as used in accordance with my invention, has greater powers of absorption and therefore serves to secure a more efiicient transfer of the pulp from the endless conveyor belts.

In Fig. 2 of the drawings 1 have shown the strips as extending in parallelism With the axis of the roll, While in Fig. 3 the strips are shown as inclined to such axis.

I claim:

1. A couch roll for paper making machines comprising a central cylindrical core, a plurality of thick strips of pressed WOOl felt of rectangular cross section, secured about the periphery of said roll in juxtaposed relationship, said strips extending longitudinally the entire length of said roll, and means to secure each of said strips to said roll, said means serving to compress said strips at their inner edges to form each strip into a Wedgeshape, whereby the outer edges of said strips form a continuous cylindrical surface.

2. A couch roll for paper making machines comprising a central cylindrical core, a plurality of thick strips of pressed Wool felt of rectangular cross section, secured about the periphery of said roll in juxtaposed relationship, said strips extending longitudinally of said roll, means to secure each of said a plurality of thick strips of pressed Wool. felt of rectangular cross section, secured about the periphery of said-roll in juxtaposed relationship, said strips extending longitudin-ally of said roll, means to secureeach of said strips to said roll, said means serving to compress said strips at their inner edges to form each strip into a Wedge-shape, Whereby the outer edges of said strips form a continuous cylindrical surface, and means for securing the side edges of each strip to itsadjacent strip to prevent separation of said strips at their outer edges, said last named means including a plurality of binding members extending circumferentially of said roll between said core and the outer surface of said strips.

In testimony whereof I have hereunto set my hand;

NELSON E. BOOTH. 

